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Aug 1, 2010

Abu Bilal ( AKA - Issa Abdul Hadi )

Analysis and performance of a V-trough solar concentrator

M. Issa Abdul Hadi
Mechanical Engineering Department, Yarmouk University, Irbid, Jordan

A thermal analysis of the V-trough solar concentrator for use in solar heating and cooling is presented. A compact analytical expression for estimating Solar Insolation received by a collector for any day with any sky conditions has been formulated. The estimated values are found to be very close to quantities recorded by solar radiation measuring instruments. The V-trough concentrator was investigated experimentally and found to be more efficient than a flat plate collector. It provided temperatures higher than 90°C. It is thus more suitable to utilize in absorption refrigeration applications.

On présente une analyse thermique d'un concentrateur solaire avec récepteur en V, pour le chauffage ou le refroidissement solaire. On a formulé une expression analytique compacte pour évaluer l'insolation reçue par un collecteur n'importe quel jour et sous n'importe quelle condition d'ennuagement. On a trouvé que les valeurs estimées étaient très proches des quantités enregistrées par les instruments servant à mesurer le rayonnement solaire. On a étudié expérimentalement le concentrateur solaire avec récepteur en V et on a trouvé qu'il était plus efficace qu'un collecteur à plaque plane; il a fourni des températures excédant 90°C et il est, par conséquent, plus approprié pour des applications en réfrigération par absorption.

Received: 19 August 1983; Revised: 12 October 1984; Accepted: 14 November 1984

Hamas leader killed in Israeli airstrike

July 31, 2010

GAZA: A leading member of Hamas was killed and eight others were injured in Israeli airstrikes on three targets in the Gaza Strip, Palestinian sources confirmed on Saturday. The airstrikes took place late on Friday.

Al-Qassam Brigades, Hamas’ armed wing, announced that one of its leaders, Issa Abdul-Hadi Al-Batran, 40, died in the strike at the Nuseirat refugee camp in the central Gaza Strip.

Medical sources said that eight Palestinians had been injured in the strike, aimed at a training compound of Hamas security forces.
Hamas security sources said that the Israeli jet carried out two other strikes on the eastern and southern Gaza Strip. It has been the most lethal strike from Israeli forces in months.

They said the planes targeted an empty area in eastern Gaza Strip and smuggling tunnels dug under the border area between the Gaza Strip and Egypt.

In a second incident, the Israeli army opened fire Saturday against three Palestinians in the southern border crossing of Erez. According to Palestinian reports they were looking for metal scraps near the fence which separates Gaza from Egypt and three were injured.

The Israeli army said the airstrikes came in response to a Russian-made Grad rocket fired from the Gaza Strip at the southern coastal Israeli town of Ashkelon. That cause minor damage but no injuries.

The Israeli army also said that the targets were “terror infrastructure” in Gaza.

The armed wing of the radical Hamas movement vowed Saturday to revenge the death of one of its militants in an overnight Israeli air raid on the Gaza Strip.

“This new stupidity won’t easily pass. We promise revenge for the blood of our martyr,” the al-Qassam Brigades said in a statement faxed to reporters.

The pro-Hamas Popular Resistance Committee (PRC) claimed responsibility for the attack, saying it was a response to a decision by the Arab League peace committee to resume direct talks with Israel.

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